I was diagnosed with IUGR in my 16th week scan where it showed that the AC and FL were @ 15 wks 2 days as compared to the BPD & HC were on target as 16 weeks. Post which I underwent a series of blood tests through which it showed I had a Protein S Deficiency of 45 as compared to the normal 70-127 range, I have been on Heparin 40ml injections for the past 12 days and asked to continue the same till delivery, In my 19th week ultra sound the doc noticed interval growth. All areas BPD,HC,AC & FL have shown an increase and growth as compared to the 16th week scan. The HC has increase considerably as compared to the AC & FL, I would like to know if that is normal. HC reading in 16th week scan was 124 mm & now in the 19th week scan - 165 mm. Please advise.